Ultrafast Phase Transition in Vanadium Dioxide Driven by Hot-Electron Injection K. Appavoo, N. F. Brady, M. Seo, J. Nag, R. P. Prasankumar, D. J. Hilton and R. F. Haglund Jr EPJ Web of Conferences, 41 (2013) 03026 Published online: 13 March 2013 DOI: 10.1051/epjconf/20134103026